Question 175681
4.) Simplify (3x – 5)(2x +1)
= 6x^2 + 3x -10x -5
= 6x^2 -7x -5
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5) Simplify (x^2 + 4)(x^2 – 5)
= x^4 -5x^2 + 4x^2 - 20
= x^4 -x^2 -20
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 Cheers,
Stan H.